(CNN) -- A new video purportedly featuring an introduction from al Qaeda leader Osama bin Laden was released Tuesday -- the sixth anniversary of the September 11, 2001, attacks on New York and Washington.

This frame grab was taken by IntelCenter, a U.S. government contractor monitoring al Qaeda messaging.

Although CNN could not independently confirm the authenticity of the video, it did feature the logo of As-Sahab Media, the company that traditionally handles al Qaeda communications to the public.

The 47-minute videotape was obtained by terrorism expert Laura Mansfield before it was to appear on several Islamist Web sites known for carrying statements from al Qaeda and other radical groups.

In the 14-minute introduction to the video, a voice identified as bin Laden praises 9/11 hijacker Waleed al-Shehri, from Saudi Arabia, who sat in seat 2B on American Airlines Flight 11, which crashed into the north tower of the World Trade Center. The voice speaking in Arabic is heard over a still picture of bin Laden and contains English subtitles.

The balance of the recording is a video will read by al-Shehri, with 9/11 symbols in the background. He is the seventh of the 19 hijackers to appear in such a will since the terrorist attacks.

There is no indication that any part of the video was recorded recently. The only element tying it to somewhat-current events is in the introduction and the mention of the death of al Qaeda in Iraq leader Abu Musab al-Zarqawi, who was killed during a U.S. raid in June 2006.

For several weeks, radical Islamist Web sites have been announcing that there would be "good news soon from Sheikh Osama bin Laden."E-mail to a friend